Creating VPNs with OpenVPN

Introduction

A VPN is a set of tools which allow networks at different locations to be securely connected, using a public network as the transport layer. A VPN produces a virtual “dedicated circuit” over the internet and use cryptography to secure it.
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Upgrade to php5 in CentOS 4

Recently one of my clients requested that he needs php5 on one of his production servers. The server runs CentOS 4.7 x86_64. I had recently migrated this server from RHEL 4.7 (see Migrating RHEL 4.6 to CentOS 4.6).
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Locale Problems in Debian and Ubuntu

Recently I have been facing some issues with locales in Debian and Ubuntu based Xen based virtual servers. These typically appear while running the man command and apt-get or dpkg commands.
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Migrating RHEL 4.7 to CentOS 4.7

Recently I was asked by one of my clients to convert their RHEL system to CentOS after their RHEL subscription expired. At the time of migration the server was running RHEL 4 update 7. Based on the current version, I chose the target version as CentOS 4.7.
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OpenSolaris – Desktop Experience – Part 1

Installation

Few days back I installed OpenSolaris 2008.11 on my aging IBM R50e Thinkpad. My previous experience with OpenSolaris Solaris Express builds were not that great from desktop point of view. Primary problem being no support for the Intel Pro Wireless adapter IPW2200B/G and the multimedia support. This time LFY distributed a live CD of OpenSolaris 2008.11, so I thought of trying my hands on it. Immediately after booting I was impressed with the desktop which came up and reminded me of my first Ubuntu experience. A quick glance at the top-right panel and I saw two network interfaces iwi0 and iprb0. Hmmm, so it picked up both my network interfaces. Its a pity that unlike last time, I do not have a wireless network to connect to, but I was able to see the list of all networks which could be found. The overall interface looked good and quite similar to Ubuntu, so it was familiar to me.
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